Function setInterval

packages/examples/common/pipes/ts/async_pipe.ts:67–78

(fn: Function, delay: number)

// protractor will not see us. Also we want to have this outside the docregion so as not to confuse
// the reader.
function setInterval(fn: Function, delay: number) {
  const zone = (window as any)['Zone'].current;
  let rootZone = zone;
  while (rootZone.parent) {
    rootZone = rootZone.parent;
  }
  rootZone.run(() => {
    window.setInterval(function (this: unknown) {
      zone.run(fn, this, arguments as any);
    }, delay);
  });
}